After someone complained about not remembering if they had taken their pills, I've come up with this reminder that clips onto the tube lid. This thing snaps on a 1.5in diameter and 0.4" thick lid.

I've put some of the design steps in my blog: http://wp.me/p3gI7M-6A

This shouldn't be to difficult to print. The letters needs some fine extrusion to be clearly defined. My version was printed with 0.25mm layers and the letter are not completly formed.

To make them stand out, I've used acrylique paint to cover the holes and once everything was dry, I sanded the top to remove any excess.

EDIT : I've added the "engraving" file for those who whould like to dual-extrude. I've also added the "plate" files to print everything at the same time.

Kissslicer does not have the dual extruder option yet and Slic3r does not seems to support BFB printers, so please tell me if you managed to dual print!

If you would like to have a different lid geometry, please post your measurments, I'll generate the associated STL.